Estudio geotécnico in San Bartolomé de Tirajana

In San Bartolomé de Tirajana, granites, gneisses and other igneous rocks predominate, forming most of the geological substratum. The presence of these materials guarantees excellent bearing capacity for buildings, since they are hard, competent soils. Sandstones, conglomerates and flysch occur occasionally, whereas the occurrence of overconsolidated clays and marls is limited, which minimises the risks associated with excessive compressibility or settlement. Levels of fine sands and silts are very scarce and do not represent a general constraint, although their localised areas require special assessment. The usual foundation can be planned directly on the igneous formations, providing a stable and durable base.

As regards seismicity, San Bartolomé de Tirajana shows moderate activity, with a recurrence of 27 events over 30 years, and a maximum recorded magnitude of 3.6. This seismic level makes it necessary to consider seismic regulations in design, although the structural risk remains contained given the low magnitude. Soil expansion is not reported as problematic, and there is no risk of karst processes in the area. Thus, the main factor conditioning the geotechnical study in this municipality is determined by the predominantly rocky-igneous nature of the ground and the moderate seismicity.